Drag Force as per Stokes Law Calculator

✖The Diameter of Spherical particle refers to the length of a straight line passing through the center of the sphere and connecting two points on its surface.ⓘ Diameter of Spherical particle [D_S]			+10% -10%
✖The Dynamic Viscosity refers to the property of a fluid that quantifies its internal resistance to flow when subjected to an external force or shear stress.ⓘ Dynamic Viscosity [μ_viscosity]			+10% -10%
✖The Settling Velocity refers to the rate at which a particle suspended in a fluid (like water or air) falls under the influence of gravity until reaches a constant speed.ⓘ Settling Velocity [V_s]			+10% -10%

✖The Drag Force refers to the resisting force experienced by an object moving through a fluid.ⓘ Drag Force as per Stokes Law [F_D]

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Formula

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Drag Force as per Stokes Law

Formula

F D = 3 \cdot \frac{D S}{π \cdot μ viscosity \cdot V s}

Example

79.88954 N = 3 \cdot \frac{128 m}{π \cdot 10.2 P \cdot 1.5 m/s}

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Drag Force as per Stokes Law Solution

STEP 0: Pre-Calculation Summary

Formula Used

Drag Force = 3*Diameter of Spherical particle/(pi*Dynamic Viscosity*Settling Velocity)
F_D = 3*D_S/(pi*μ_viscosity*V_s)
This formula uses 1 Constants, 4 Variables

Constants Used

pi - Archimedes' constant Value Taken As 3.14159265358979323846264338327950288

Variables Used

Drag Force - (Measured in Newton) - The Drag Force refers to the resisting force experienced by an object moving through a fluid.
Diameter of Spherical particle - (Measured in Meter) - The Diameter of Spherical particle refers to the length of a straight line passing through the center of the sphere and connecting two points on its surface.
Dynamic Viscosity - (Measured in Pascal Second) - The Dynamic Viscosity refers to the property of a fluid that quantifies its internal resistance to flow when subjected to an external force or shear stress.
Settling Velocity - (Measured in Meter per Second) - The Settling Velocity refers to the rate at which a particle suspended in a fluid (like water or air) falls under the influence of gravity until reaches a constant speed.

STEP 1: Convert Input(s) to Base Unit

Diameter of Spherical particle: 128 Meter --> 128 Meter No Conversion Required
Dynamic Viscosity: 10.2 Poise --> 1.02 Pascal Second (Check conversion here)
Settling Velocity: 1.5 Meter per Second --> 1.5 Meter per Second No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

F_D = 3*D_S/(pi*μ_viscosity*V_s) --> 3*128/(pi*1.02*1.5)

Evaluating ... ...

F_D = 79.8895400618141

STEP 3: Convert Result to Output's Unit

79.8895400618141 Newton --> No Conversion Required

FINAL ANSWER

79.8895400618141 ≈ 79.88954 Newton <-- Drag Force

(Calculation completed in 00.004 seconds)

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Created by Ishita Goyal

Meerut Institute of Engineering and Technology (MIET), Meerut

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Verified by Suraj Kumar

Birsa Institute of Technology (BIT), Sindri

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< Drag Force Calculators

Drag Force as per Stokes Law

Go Drag Force = 3*Diameter of Spherical particle/(pi*Dynamic Viscosity*Settling Velocity)

Diameter given Drag Force as per Stokes Law

Go Diameter of Spherical particle = Drag Force/3*pi*Settling Velocity*Dynamic Viscosity

Drag Force as per Stokes Law Formula

Drag Force = 3*Diameter of Spherical particle/(pi*Dynamic Viscosity*Settling Velocity)
F_D = 3*D_S/(pi*μ_viscosity*V_s)

what is Drag Force?

The drag force is the frictional force exerted by the fluid on any object when it is put into it.The drag depends directly on the size of the body. Since we are dealing with aerodynamic forces, the dependence can be characterized by some area.

How to Calculate Drag Force as per Stokes Law?

Drag Force as per Stokes Law calculator uses Drag Force = 3*Diameter of Spherical particle/(pi*Dynamic Viscosity*Settling Velocity) to calculate the Drag Force, The Drag Force as per Stokes Law formula is defined that drag D is equal to the drag coefficient Cd times the density r times half of the velocity V squared times the reference area A. Drag Force is denoted by F_D symbol.

How to calculate Drag Force as per Stokes Law using this online calculator? To use this online calculator for Drag Force as per Stokes Law, enter Diameter of Spherical particle (D_S), Dynamic Viscosity (μ_viscosity) & Settling Velocity (V_s) and hit the calculate button. Here is how the Drag Force as per Stokes Law calculation can be explained with given input values -> 79.88954 = 3*128/(pi*1.02*1.5).

FAQ

What is Drag Force as per Stokes Law?

The Drag Force as per Stokes Law formula is defined that drag D is equal to the drag coefficient Cd times the density r times half of the velocity V squared times the reference area A and is represented as F_D = 3*D_S/(pi*μ_viscosity*V_s) or Drag Force = 3*Diameter of Spherical particle/(pi*Dynamic Viscosity*Settling Velocity). The Diameter of Spherical particle refers to the length of a straight line passing through the center of the sphere and connecting two points on its surface, The Dynamic Viscosity refers to the property of a fluid that quantifies its internal resistance to flow when subjected to an external force or shear stress & The Settling Velocity refers to the rate at which a particle suspended in a fluid (like water or air) falls under the influence of gravity until reaches a constant speed.

How to calculate Drag Force as per Stokes Law?

The Drag Force as per Stokes Law formula is defined that drag D is equal to the drag coefficient Cd times the density r times half of the velocity V squared times the reference area A is calculated using Drag Force = 3*Diameter of Spherical particle/(pi*Dynamic Viscosity*Settling Velocity). To calculate Drag Force as per Stokes Law, you need Diameter of Spherical particle (D_S), Dynamic Viscosity (μ_viscosity) & Settling Velocity (V_s). With our tool, you need to enter the respective value for Diameter of Spherical particle, Dynamic Viscosity & Settling Velocity and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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